ZAMSTAR TB Prevalence Survey Monde Muyoyeta ZAMBART Project Primary Objective

Measure the effect of the ZAMSTAR interventions on TB prevalence by comparing the prevalence of TB across study arms Secondary Objectives

Determine the prevalence of culture positive tuberculosis in the study sites Measure the prevalence of risk factors for TB (HIV, diabetes, smoking, indoor air pollution, alcohol & SES) Determine the prevalence of people with current TB (self-reported) Determine health care seeking behavior of people with respiratory symptoms ZAMSTAR: The /South Africa TB and AIDS Reduction Study-Overview

A study designed to find out whether combinations of community based interventions aimed at increasing case finding of TB and implementing packages of combined TB/HIV care can reduce TB

Interventions were implemented for 3 years from 2006-2009

Prevalence of TB across study arms is one of the end points Study Setting

ZAMSTAR ZAMSTAR Sites in Zambia

Sites Luapula Mansa District-Senama, Central Copperbelt -Chifubu and Chipulukusu -Chimwemwe, Ndeke Central Province -Makululu, Ngungu/Bwacha -Chawama, Kanyama, Chipata, George Southern Province Choma District-Pemba and Shempande - Maramba and Dambwa Prevalence Survey -Sample Size & Enumeration

24 sites, 16 in Zambia and 8 in Western Cape- SA Sample size – 80 000 Zambia – 40 000 Western cape Enumeration – SEA are randomly visited – Every HH in the SEA is visited and enumerated MAPS with SEAS numbered

Data Collection

Field data is collected using PDA Data is down loaded everyday and sent to HO via internet Data is available in real time(some delays occur)-used for monitoring progress, quality checks and supervision

Current Status

Survey in process, started Dec 2009 Expected to end Dec 2010 41 thousand recruited Male under representation-35% HIV testing average is 67% HH consent average is 80% Adult consent average is 70% Monitoring & Quality Assurance

Team leaders are responsible for day to day supervision Monthly field visits by HO based supervisors QA of randomly sampled HH using QA form Monitoring of data and feed back to teams ( consent rates, HIV testing etc) Use of GIS to map visited HH per SEA

Community Involvement

Pre-Survey – Existing CABs informed about next steps for ZAMSTAR study – Dissemination meetings for ZAMSTAR trial held in each study site, partners and community members part of meeting – Brochures developed for distribution to community members Community Involvement

During survey – Mapping and defining borders of enumeration areas done in conjunction with CAB members – Sensitisation is done one week before team moves into SEA • Door to door with distribution of brochures(staff with community members) • Drama- use of sketches designed by ZAMSTAR teams • Song and Dance- songs designed to inform about survey Drama sensitisation Brochure

Used in door-to door sensitisation HIV Testing

 Prevalence of HIV is also being measured  All participants informed about HIV testing during informed consent process(counselling starts here)  Opt-out option is given but study participants encouraged to test( high risk in setting, benefits of testing are told)  Testing is offered to all including those known to be HIV positive  Testing is done within the household using rapid tests HIV Testing-Rationale

 Zambia is high HIV burden country (13-23% in adults)  Currently less than 20% adults know HIV status  Opportunity to increase testing uptake and test acceptability of HIV testing offered in the home  Reduce delay in diagnosis of HIV-thus improve outcomes of ART ?  Routine testing TB pts/suspects is policy  HIV is highest known risk factor for TB – Comparing prevalence of TB across study arms should also consider HIV prevalence HIV Testing-Pre Survey

Training and certification of lay counsellors to carry out HIV testing Field simulations(piloting) Timings Acceptability Training step by step field procedures including when HIV test should not be done Step by Step Training-HIV Testing

Pre-Survey training (in-house) Counselling procedures Handling results and giving back results Confidentiality Recording results Referrals for further care or testing Bio safety-Universal precautions for handling biological samples Challenges of Field HIV Testing

Participant crisis due to unexpected HIV positive result Referrals sometimes not attended to early due to overburdened health services Slows down recruitment process due to counselling May reduce consent rate but: Opt out option given to all participants

Laboratory Capacity

4 containerised laboratories put in place Each lab can handle 100 samples a day and services 4 sites Staff recruited and trained On going monitoring and retraining of staff during the survey

Lab Challenges

Coordination-labs are in four districts(monthly visits to labs are required), sometimes more Collection of lab data centrally Transportation of samples, furthest sites 800km Transportation of isolates for archiving Laboratory supplies-all stored centrally in Lusaka Furthest lab is 600Km from Lusaka Funding

Bill and Melinda Gates Foundation Acknowledgements

ZAMSTAR PIs: Helen Ayles, Nulda Beyers, Peter Godfrey-Faussett Ministry of Health in Zambia Central Statistics Office ZAMSTAR study team Thank You!